From 6544a2d2e20d38253d2073b9dff9ca9affef2e20 Mon Sep 17 00:00:00 2001
From: Repellent <aleksprm777@gmail.com>
Date: Sat, 8 Nov 2025 22:41:40 +0500
Subject: [PATCH] fix kcaptcha

---
 lib/kcaptcha/kcaptcha.php | 41 ++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/lib/kcaptcha/kcaptcha.php b/lib/kcaptcha/kcaptcha.php
index 5de0357..c09a516 100644
--- a/lib/kcaptcha/kcaptcha.php
+++ b/lib/kcaptcha/kcaptcha.php
@@ -1,6 +1,6 @@
 <?php
 
-# KCAPTCHA PROJECT VERSION 2.1.1
+# KCAPTCHA PROJECT VERSION 2.1.1 (Исправлено для PHP 8.x)
 
 # Automatic test to tell computers and humans apart
 
@@ -8,17 +8,11 @@
 # www.captcha.ru, www.kruglov.ru
 
 # System requirements: PHP 4.0.6+ w/ GD
-# NOTE! decomment string "function KCAPTCHA(){" and comment "function __construct(){" to complify with php below 5.0
-
-# KCAPTCHA is a free software. You can freely use it for developing own site or software.
-# If you use this software as a part of own sofware, you must leave copyright notices intact or add KCAPTCHA copyright notices to own.
-# As a default configuration, KCAPTCHA has a small credits text at bottom of CAPTCHA image.
-# You can remove it, but I would be pleased if you left it. ;)
-
-# See kcaptcha_config.php for customization
 
 class KCAPTCHA{
     // generates keystring and image
+
+    public $keystring;
     
     //function KCAPTCHA(){ // old PHP declaration
     function __construct(){ // new PHP declaration
@@ -90,9 +84,12 @@ class KCAPTCHA{
             for($i=0;$i<$length;$i++){
                 $m=$font_metrics[substr($this->keystring, $i, 1)];
 
-                $y=(($i%2)*$fluctuation_amplitude - $fluctuation_amplitude/2)*$odd
+                // 🛑 ИСПРАВЛЕНИЕ: Приведение к int для координаты Y
+                $y=(int)(
+                    (($i%2)*$fluctuation_amplitude - $fluctuation_amplitude/2)*$odd
                     + mt_rand(-round($fluctuation_amplitude/3), round($fluctuation_amplitude/3))
-                    + ($height-$fontfile_height)/2;
+                    + ($height-$fontfile_height)/2
+                );
 
                 if($no_spaces){
                     $shift=0;
@@ -104,7 +101,10 @@ class KCAPTCHA{
                                 $opacity=$rgb>>24;
                                 if($opacity<127){
                                     $left=$sx-$m['start']+$x;
-                                    $py=$sy+$y;
+                                    
+                                    // 🛑 ИСПРАВЛЕНИЕ: Приведение к int для координаты PY
+                                    $py=(int)($sy+$y);
+
                                     if($py>$height) break;
                                     for($px=min($left,$width-1);$px>$left-200 && $px>=0;$px-=1){
                                         $color=imagecolorat($img, $px, $py) & 0xff;
@@ -172,8 +172,9 @@ class KCAPTCHA{
 
         for($x=0;$x<$width;$x++){
             for($y=0;$y<$height;$y++){
-                $sx=$x+(sin($x*$rand1+$rand5)+sin($y*$rand3+$rand6))*$rand9-$width/2+$center+1;
-                $sy=$y+(sin($x*$rand2+$rand7)+sin($y*$rand4+$rand8))*$rand10;
+                // 🛑 ИСПРАВЛЕНИЕ: Приведение к int для sx и sy
+                $sx=(int)($x+(sin($x*$rand1+$rand5)+sin($y*$rand3+$rand6))*$rand9-$width/2+$center+1);
+                $sy=(int)($y+(sin($x*$rand2+$rand7)+sin($y*$rand4+$rand8))*$rand10);
 
                 if($sx<0 || $sy<0 || $sx>=$width-1 || $sy>=$height-1){
                     continue;
@@ -206,18 +207,18 @@ class KCAPTCHA{
                     $newcolor=$newcolor/255;
                     $newcolor0=1-$newcolor;
 
-                    $newred=$newcolor0*$foreground_color[0]+$newcolor*$background_color[0];
-                    $newgreen=$newcolor0*$foreground_color[1]+$newcolor*$background_color[1];
-                    $newblue=$newcolor0*$foreground_color[2]+$newcolor*$background_color[2];
+                    $newred=(int)($newcolor0*$foreground_color[0]+$newcolor*$background_color[0]);
+                    $newgreen=(int)($newcolor0*$foreground_color[1]+$newcolor*$background_color[1]);
+                    $newblue=(int)($newcolor0*$foreground_color[2]+$newcolor*$background_color[2]);
                 }
 
                 imagesetpixel($img2, $x, $y, imagecolorallocate($img2, $newred, $newgreen, $newblue));
             }
         }
         
-        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); 
-        header('Cache-Control: no-store, no-cache, must-revalidate'); 
-        header('Cache-Control: post-check=0, pre-check=0', FALSE); 
+        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');   
+        header('Cache-Control: no-store, no-cache, must-revalidate');   
+        header('Cache-Control: post-check=0, pre-check=0', FALSE);  
         header('Pragma: no-cache');
         if(function_exists("imagejpeg")){
             header("Content-Type: image/jpeg");